Milestones Review

Which is a property of electromagnets AND bar magnets?

• they include and electrical source

• they are created by electric current

• they have a north pole and a south pole

• the have a magnetic field that can be strengthened or weakened

A puddle of water on a sidewalk evaporates. Which statement could explain what happened?

• The temperature fell below 0 C, making the water freeze.

• The temperature fell below 0 C, making the water turn into water vapor.

• The sun heated the water, which changed from a liquid to a gas.

• The sun heated the water, which changed from a liquid to a solid.

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which obervation MOST LIKELY shows evidence that a chemical change is taking place?

• A solid changes shape when a student bends it.

• Bubbles form when a student heats liquid with a burner.

• The temperature of a liquid changes when a student pours it into a jar.

• The temperature of a solid changes when a student puts it in a freezer.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these is a chemical property?

• whether a substances bends/folds

• whether a substance dissolves

• whether a substance reacts with oxygen

• whether a substance changes from a liquid to a gas

Tags

NGSS.MS-PS1-2

Which of these is a way to make an electromagnet stronger?

• put a swtch in a circuit

• replace the iron core with copper

• replace the copper wire with plastic wire

• wrap the wire around the iron core more times

Tags

NGSS.MS-PS2-3

Which is an example of a state of matter change?

• liquid water freezes into ice

• liquid water freezes into a gas

• water vapor condenses into a solid ice cube

• a solid ice cube evaporates into water vapor

Tags

NGSS.MS-PS1-4

Why might a sock stick to a sweater when you take them out of the clothes dryer?

• both items are dry

• the sock and the sweater have opposite charges

• an electric current flows between the sock and the sweater

• an electric current reduced the number of electrons in both items

Tags

NGSS.MS-PS2-3

Which of these materials is a conductor?

• rubber

• plastic

• copper

• glass

Which of these materials will a magnet attract?

• copper

• rubber

• nickel

• plastic

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of these can be turned on and off?

• bar magnet

• electromagnet

• horseshoe magnet

• refrigerator magnet